▎ 摘　　要

NOVELTY - Method comprises (i) designing 0.5 wt.% nano graphene, 0.5-0.8 wt.% magnesium powder, 0.5-0.6 wt.% silicon powder and balance aluminum, (ii) uniformly mixing all raw materials, adding aluminum powder as adhesive, and attaching uniformly mixed alloy powder on tungsten molybdenum alloy ball as alloy additive, (iii) melting pure aluminum ingot in crucible resistance furnace and controlling temperature, (iv) adding alloy additive into molten aluminum liquid, continuously blowing argon and stirring uniformly until all alloy additives melted into molten aluminum, removing tungsten-molybdenum alloy ball and slag, pouring aluminum alloy liquid into steel mold with cooling water, and using hydrochloric acid to wash and recycle tungsten-molybdenum alloy ball, (v) processing homogenized aluminum alloy into standard sample, performing circulating alternating stress treatment on high frequency fatigue testing machine, and (vi) performing microcosmic and performance testing on experimental sample. USE - The method is useful for strengthening and toughening aluminum alloy with compound nano-phase by circulating alternating stress. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for high-toughness high-conductivity aluminum alloy prepared by method of preparation of strengthening and toughening aluminum alloy with compound nano-phase by circulating alternating stress.